#5306: Fix compilation on Windows by properly merging change 69495.
+ fixed an obvious merge glitch in a windows-only test.

Patch by Hirokazu Yamamoto.

I added a _PyVerify_fd() call to os.device_encoding() (new in python 3.0)
which also uses a raw file descriptor.
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index f28f862..0136c5e 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -576,12 +576,12 @@
         self.assertRaises(WindowsError, os.chdir, support.TESTFN)
 
     def test_mkdir(self):
-        f = open(test_support.TESTFN, "w")
+        f = open(support.TESTFN, "w")
         try:
             self.assertRaises(WindowsError, os.mkdir, support.TESTFN)
         finally:
             f.close()
-            os.unlink(test_support.TESTFN)
+            os.unlink(support.TESTFN)
 
     def test_utime(self):
         self.assertRaises(WindowsError, os.utime, support.TESTFN, None)